First, a Correction: I mistakenly reported the size of my source footage at the beginning of this thread. I am working with RED 5K footage, not 4K. I've been off this project for a while, but I now have a mostly successful workflow and feel I should share in case someone else—or I, after I've forgotten—needs the answer to this very specific issue. I also feel I owe a follow-up to everyone that generously contributed suggestions that got me there — most of your replies deserve at least a partial "Correct Answer." Despite, the original subject line, this really became an issue for me of how to get the image to my outboard TV and just how to get fluid playback on any of my monitors, given my under-powered gear. Here's what's working. I'll be as concise as I can manage (which is rarely all that). I'll skip how to do some of the basic tasks like importing and creating proxies. And, again, my source material is RED 5K and my system specs can be found after my signature below. I imported my clips. I created proxies. I chose 1280 x 720 Apple ProRes 422 from the pulldown menu. I created a sequence setting that works in my system: 1920 x 1080p, 23.976 fps and everything else default. Here's a frame grab: I went to Preferences/Playback/Video Device/Black Magic Playback Setup. I made sure Intensity Pro 4K was chosen as Device and, because my proxies are 1280 x 720 and I'm working with a 1920 x 1080 sequence, under For output of unsupported frame sizes, I chose Scale up. ​Making sure the ​Toggle Proxies ​button is on, I start cutting. Because the source footage is larger than the sequence settings everything is extremely cropped. To fix this, I choose Scale to Frame Size. I would typically prefer Set to Frame Size for its flexibility, but, for some reason, for fluid playback, I have to render before playing back with Set and Scale plays fine without rendering. And that gives me a more or less usable workflow. I still don't get a fluid playback on the Source side regardless of whether the Toggle Proxies button is on and Source also doesn't play on my outboard TV. But, geez, what do I want, eggs in my beer? Of course, I now don't have an exportable 5K sequence. I addressed this in another thread, but a here's a quick executive summary of what I've worked out for that: Upon picture lock, I copied the contents of my sequence. Created a new sequence with settings that match my full rez footage: …and pasted my picture lock into it. I think this is now a perfectly suitable 5K sequence ready for export. I appreciate that no one may make it through this late, wordy and extremely system-specific response, but should that happen and you find flaws in my process or conclusions (especially in regard to my export expectations), I would be thrilled to hear back. Thank you all for your help and your patience. Martin Early 2009 Nehalem MacPro4,1, 2 X 2.6 GHz Quad-Core OS High Sierra 10.13.6 Samsung 850 EVO 1 TB system drive 32 GB RAM ATI Radeon HD 4870 GRFX Card Blackmagic Intensity Pro 4K, Driver: 10.11.4 Adobe Premiere Pro CC 2019 v. 13.1.2 Adobe Media Encoder CC v. 13.0.2.39 Mocha Pro Plug-in v. 6.0.2 build 217.x Boris Continuum 2019 v. 12.0.4
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